I have integrated swagger in my springboot application through following dependency

    <dependency>
        <groupId>org.springdoc</groupId>
        <artifactId>springdoc-openapi-starter-webmvc-ui</artifactId>
        <version>2.0.2</version>
    </dependency>

I have also allowed swagger URL in my security configurations as following

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.HttpMethod;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.security.web.SecurityFilterChain;

@Configuration
@EnableWebSecurity
public class SecurityConfig {

    @Bean
    public PasswordEncoder passwordEncoder() {
        return new BCryptPasswordEncoder();
    }


    @Bean
    public SecurityFilterChain securityFilterChain(HttpSecurity http) {

        try {
            return http
                    .authorizeHttpRequests(authCustomizer -> authCustomizer
                            .requestMatchers(HttpMethod.POST,
                                    "/api/users/register", "/api/users/login", "/swagger-ui/**").permitAll()
                            .requestMatchers(HttpMethod.GET, "/api/users/{id}").hasRole("USER")
                            .requestMatchers(HttpMethod.PUT, "/api/users/{id}").hasRole("USER")
                            .requestMatchers(HttpMethod.DELETE, "/api/users/{id}").hasRole("USER")
                            .requestMatchers(HttpMethod.POST, "/api/transactions").hasRole("USER")
                            .requestMatchers(HttpMethod.GET, "/api/transactions/{id}").hasRole("USER")
                            .requestMatchers(HttpMethod.PUT, "/api/transactions/{id}").hasRole("USER")
                            .requestMatchers(HttpMethod.DELETE, "/api/transactions/{id}").hasRole("USER")
                    )
                    .build();
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }
}

But still when I run the URL (http://localhost:8080/swagger-ui/index.html), I get following error.